cli improvements, added examples to nightly package

Earthfile

@@ -108,12 +108,14 @@ test-all:
 
 build-nightly-release:
     FROM +test-rust
-    COPY --dir .git ./
+    COPY --dir .git LICENSE LEGAL_DETAILS ./
     # version.txt is used by the CLI: roc --version
     RUN printf "nightly pre-release, built from commit " > version.txt
     RUN git log --pretty=format:'%h' -n 1 >> version.txt
+    RUN printf " on: " >> version.txt
+    RUN date >> version.txt
     RUN cargo build --features with_sound --release
-    RUN cd ./target/release && tar -czvf roc_linux_x86_64.tar.gz ./roc
+    RUN cd ./target/release && tar -czvf roc_linux_x86_64.tar.gz ./roc ../../LICENSE ../../LEGAL_DETAILS ../../examples/hello-world ../../examples/hello-rust ../../examples/hello-zig ../../compiler/builtins/bitcode/src/ ../../roc_std
     SAVE ARTIFACT ./target/release/roc_linux_x86_64.tar.gz AS LOCAL roc_linux_x86_64.tar.gz
 
 # compile everything needed for benchmarks and output a self-contained dir from which benchmarks can be run.

cli/src/lib.rs

@@ -23,6 +23,7 @@ pub const CMD_REPL: &str = "repl";
 pub const CMD_EDIT: &str = "edit";
 pub const CMD_DOCS: &str = "docs";
 pub const CMD_CHECK: &str = "check";
+pub const CMD_VERSION: &str = "version";
 
 pub const FLAG_DEBUG: &str = "debug";
 pub const FLAG_DEV: &str = "dev";
@@ -103,8 +104,11 @@ pub fn build_app<'a>() -> App<'a> {
         .subcommand(App::new(CMD_REPL)
             .about("Launch the interactive Read Eval Print Loop (REPL)")
         )
+        .subcommand(App::new(CMD_VERSION)
+            .about("Print version information")
+        )
         .subcommand(App::new(CMD_CHECK)
-            .about("Build a binary from the given .roc file, but don't run it")
+            .about("When developing, it's recommended to run `check` before `build`. It may provide a useful error message in cases where `build` panics")
             .arg(
                 Arg::new(FLAG_TIME)
                     .long(FLAG_TIME)
@@ -190,7 +194,7 @@ pub fn build_app<'a>() -> App<'a> {
 
     if cfg!(feature = "editor") {
         app.subcommand(
-            App::new(CMD_EDIT).about("Launch the Roc editor").arg(
+            App::new(CMD_EDIT).about("Launch the Roc editor (Work In Progress)").arg(
                 Arg::new(DIRECTORY_OR_FILES)
                     .index(1)
                     .multiple_values(true)

cli/src/main.rs

@@ -1,13 +1,13 @@
 use roc_cli::build::check_file;
-use roc_cli::{
+use roc_cli::{BuildConfig, CMD_BUILD, CMD_CHECK, CMD_DOCS, CMD_EDIT, CMD_REPL, CMD_VERSION, DIRECTORY_OR_FILES, FLAG_TIME, ROC_FILE, build_app, docs, repl};
-    build_app, docs, repl, BuildConfig, CMD_BUILD, CMD_CHECK, CMD_DOCS, CMD_EDIT, CMD_REPL,
-    DIRECTORY_OR_FILES, FLAG_TIME, ROC_FILE,
-};
 use roc_load::file::LoadingProblem;
 use std::fs::{self, FileType};
 use std::io;
 use std::path::{Path, PathBuf};
 
+#[macro_use]
+extern crate const_format;
+
 #[global_allocator]
 static ALLOC: mimalloc::MiMalloc = mimalloc::MiMalloc;
 
@@ -122,6 +122,11 @@ fn main() -> io::Result<()> {
 
             Ok(0)
         }
+        Some(CMD_VERSION) => {
+            println!("roc {}", concatcp!(include_str!("../../version.txt"), "\n"));
+
+            Ok(0)
+        }
         _ => unreachable!(),
     }?;